I support the JPs right to have the opinion he has. I just think he didn't choose wisely in how he expressed his opinion.
All "merchants" reserve the right to NOT provide services to people as they choose. It is not a RIGHT that a person shop in Walmart :-). Thus, I think that if this JP was a JP with limited "powers", more of a "in name only", I think he should have a right to refuse services.

Now, that said--I believe there are certain professions that don't or shouldn't allow their personal beliefs to override their obligations to the public. Medical professionals are included in that, law enforcement/military are others. I worked w/ an officer who, on a personal level did not support the death penalty. He never let that interfer with his obligation to investigate a crime and arrest a person--who would be facing the death penalty if found guilty. I worked w/ a Paramedic who was a devout Jehovah's Witness. He didn't believe in receiving certain medical care or treatment. His core belief did not prevent him from providing medical care to those that needed it.
*shrugs* You are willing to accept that an MD would allow his beliefs to overshadow your need for a specific type of care. And in some instances, doing that could violate the Hippocratic oath ("first do no harm".) I understand when an MD is not comfortable with treating or diagnosing certain things because they don't have the knowledge, capabilities or abilities. But, for me, it is completely unacceptable for an MD to refuse to treat because it goes against his/her moral compass.....

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"Never explain — your friends do not need it and your enemies will not believe you anyway. —Elbert Hubbard"